Oscillating roll for printing presses

Abstract

In a drive for the fluid distributing roller of a printing press, the roller, in addition to rotating about its axis, is required to be axially reciprocated. The distributing roller is mounted upon a drive shaft with which it rotates but with respect to which it can be axially reciprocated. A cam is connected to the shaft and is gear-rotated therewith, and through a cam follower, the shaft of the cylinder, while being rotated, is caused to axially reciprocate by the presence of a cam follower operating in the rotating cam.

What I claim as new and novel and desire to protect by Letters Patent is set forth in the appended claims: 
     
       1. A distributing roller assembly for distributing printing ink or a dampening liquid on a driven roller of a printing machine comprising: (a) a first shaft rotatably carried by said printing machine for rotatably supporting a dual geared drive member;   (b) a second shaft for the distributing roller journaled through a suitable bearing carried by said printing machine extending in a spaced parallel relation to said first shaft;   (c) a barrel cam gear adapted to be driven by said drive member and keyed to said second shaft for rotation therewith;   (d) a second driven gear mounted on said second shaft in spaced relation to said first gear and adapted to be rotated freely of said second shaft;   (e) cam means extending between said barrel cam gear and second driven gear and effective for causing said barrel cam gear and said second shaft to be reciprocally axially moved relative to said second gear and said dual drive gear;   (f) said dual geared drive member having different gear teeth ratios between it and said hub gear and said second driven gear.   
     
     
       2. A distributing roller assembly as defined by claim 1 wherein said cam means comprises a cam track formed in the hub of said barrel cam gear in a cam follower mounted adjacent to the periphery of said second gear and adapted to cooperate with said cam track at a speed of rotation different than the speed of rotation of said first gear. 
     
     
       3. A distributing roller assembly as defned by claim 1 wherein said cam follower comprises a mounting bracket removably attached to the periphery of said second gear and extending axially of the distributing roller shaft and being confined within the gear's periphery of said second gear so as not to interfere with the gear engagement between said dual drive gear and said first and second gears as they are rotated thereby.